Question

Maximum prescribed limit of Fe in drinking water is:
A) 0.1 ppm
B) 0.2 ppm
C) 0.5 ppm
D) 0.2 ppb

Answer 1

Hint: Iron is a lustrous and a ductile metal which is silver grey in colour. It is the final product produced by the stellar nucleosynthesis and is the heaviest metal which does not require any supernova. It tends to dissolve in dilute acids and get rust in the presence of damp air. it is present in the ferric form at room temperature.

Complete step-by-step answer:
Water is the one of the primer necessities for life. The water which is present under the ground contains some impurities such as zinc, chloride, nitrate, sulphate, iron, fluoride. The presence of microbes can contaminate the water. The high rate of iron can cause the undesirable growth of iron bacteria which thus results in the formation of a slimy coat on the pipe.

The level of fluoride also increases in drinking water which is harmful. It increases due to the presence of the natural rocks which have a high fluoride source. There are some agencies which have prescribed the limit of fluoride in drinking water such as APHA, WHO, ISI, and CPCB. The prescribed limit of Fe in drinking water is 0.2ppm.

So the correct answer is option ‘B’.

Note: Our body contains 4 grams of iron in the form of haemoglobin in the blood. It is the building block of steel which helps in transferring of oxygen in the blood. It gives nourishment to the plants. There are different types of iron such as wrought iron, cast iron, pig iron and plain iron.